-Look at the sign! -Oh, I see.We waste water.A．canB．mustC．mustn’tD．needn’t 题目和参考答案——青夏教育精英家教网——

题目内容

—Look at the sign!
—Oh, I see.We _______ waste water.

A．can

B．must

C．mustn’t

D．needn’t

C

情态动词的用法。根据标志可知为禁止浪费水的标志。表示禁止命令用must. 因此选C。

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